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Preparation of spinel ferrite NiFe2O4 fibres by organic gel-thermal decomposition process

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Abstract

Functional spinel ferrite fibers are attractive for high-tech applications. The spinel NiFe2O4 fibres have been successfully prepared by the organic gel-thermal decomposition process from raw materials of Ni, Fe nitrate salts and citric acid. The gel spinning performance was a major factor for preparation of uniform gel fibrous precursors. The gel spinnability was related to the citrate-metal complex structure and linear-type structural molecules [(C6H6O7)4NiFe2]n for the gel precursor was possibly formed during the complexation reaction between the citric acid and metal ions at pH 5. The composition, structure of the gel precursors and products derived from thermal decomposition of these precursors were characterized by FTIR, XRD, and SEM. The thermal decomposition process of the gel precursors was investigated by TG-DSC. The prepared spinel NiFe2O4 fibres having grain sizes of 60–70 nm were featured with diameters of about 1 μm, and aspect ratios up to 106 (length/diameter).

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Acknowledgments

This study was supported by the National Nature Science Foundation of China (No. 50474038).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Chun-Ye Zhang, Xiang-Qian Shen, Jian-Xin Zhou, Mao-Xiang Jing & Kai Cao

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  1. Chun-Ye Zhang
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  2. Xiang-Qian Shen
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  3. Jian-Xin Zhou
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  4. Mao-Xiang Jing
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Correspondence to Xiang-Qian Shen.

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Zhang, CY., Shen, XQ., Zhou, JX. et al. Preparation of spinel ferrite NiFe2O4 fibres by organic gel-thermal decomposition process. J Sol-Gel Sci Technol 42, 95–100 (2007). https://doi.org/10.1007/s10971-006-1515-5

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  • DOI: https://doi.org/10.1007/s10971-006-1515-5

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